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प्रश्न
What are fuels?
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उत्तर
Fuels: The substances which burn in air to produce a large amount of energy in the form of heat and light are called fuels.
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संबंधित प्रश्न
Answer the question put against the following constituents of air :
Carbon dioxide : “Although carbon dioxide plays no role in respiration, all life would come to an end if there is no carbon dioxide in air.” Support this statement with relevant facts.
Explain the conversion of nitrogen into nitrates during lightning.
Tick (√) the most appropriate answer.
The humans pollute the air by :
Complete the statement given below by filling in the blank with the correct word from the words given:
The component of air used in photosynthesis is ______ and the products of photosynthesis is oxygen.
Why do we see the sky and air clear and clean after rainfall?
Explain why during an incident of fire, one is advised to wrap a woollen blanket over a burning object.
What are the components of air?
Match the following
| 1. | Oxygen | a. | Carbon dioxide |
| 2. | Azote | b. | Nitrogen |
| 3. | Solvay process | c. | Vital life |
| 4. | Gun powder | d. | No life |
Nitrogen is an essential element present in proteins and nucleic acids which are the building blocks of living things.
State whether the following statement is true or false. If false, correct them.
Plants consume oxygen for respiration.
